Reversible disk-sharpening tongs



April 19, 1927. L H. FARMER REVERSIBLE DISK SHARPENING TONGS Filed May 10, 1926 LH. FARMER Patented Apr. 19, 1927.

Isaac I-I. FAERM'ER, or MQN'T'E'ZUMA, Iowa;

nsvEesmLE- nisresir-nnrnnrne Tones.

Application filed May 10,

The object of this invention isto provide an improved construction for tongs employedin sharpening-the disks-of disk harrows, roller cuttersand; the like.

A further object of the invention is to provide an improved disk sharpening tongs in whiclrthe: blade isloosellymountedin a: seat, isinstantly removable by 'upwa-rdimovement: in'a'olzder to reverse its position,-. and is quickly adjusted'as*tofeleva'tion by means of a set screw engagingits lower end.

A further object of: the inventiona'isto provide an improved disk-sharpeningtongs in WllICll: the blade and roller a-re carried by the respective arms and are reversible as to position so as to sharpen both sides o'fadisk conveniently.

further; object 'of the invention is to provide an improved disk-sharpening tongs wherein one arm of the tongs has a quickdetachable connection to the other whereby it may be instantly removed and reversed without the aid of any tool.

With these and other objects in view, my invention consists in the construction arrangement and combination of elements hereinafter set forth, pointed out in the claims and illustrated by the accompanying drawing, in which- I Figure 1 is a perspective view of my improved tongs.

Figure 2 is a plan view illustrating the tongs in position for sharpening one side of the edge of a disk.

Figure 3 is a plan view illustrating the tongs in reversed position for sharpening the other side of the cutting edge.

Figure 4 is a vertical section on the line 4-4 of Figure 3, showing particularly the means for mounting and adjusting the cutting blade.

In the construction of the device as shown the numeral 10 designates a standard which has integrally formed at its lower end a suitable base 11 and at its upper end a pivot stud 12. Pivotally mounted on the stud 12 is the blade-carrying arm 13 of the tongs, with which cooperates a roller-carrying arm 14 which is pivotally and also removably mounted on said stud. These parts may be made of any suitable material such as mild steel ormalleable iron and of any convenient size and shape. The arms 13 and 14 are arranged to swing in substantially horizontal planes and are pivoted nearer one end than the other the longer portions 1926.- S'erial Nb. 107,948.

of the; tong arms orlevers serving ashandles by which they may be manipulated; Formed on the short end of the arm 13 is a yoke-- shaped bracket- 15 arranged at an obtuse angle to' the armand having. in its upper; portion-a rectangular hole or seat in which a cutting blade 16 is removably. and adjust; ably mounted. The blade 16 fitssnugly in its seat and is: vertically movable therein, andit has atits' upper end'an' angular-1y arranged portion 17 having a cutting edge. In the lower. portion of the bracket locis threaded an adjusting screw 18 which engages the lower end of the blade 16 and serves to adjust the said blade vertically: as'saidiserew is moved u p or downin its seat; Qnthe shortend ofthe tong arm 14- is-rotatably mounted a roller 19 which is opposed to the cutting blade 16. The short end of the arm 14 is bent or curved toward the other arm 13 and bracket 15 so that the edge of the roller 19 may be brought into a position substantially parallel with the cutting edge ofthe blade when the tong arms are moved toward each other manually, as will be clearly seen in Figures 2 and 3. This permits the peripheral portion of a disk such as 20 to be received between the short arms of the tong arms, and be pressed by the roller 19 against the cutting edge of the blade 16 and be sharpened thereby. The roller 19 preferably is beveled or tapered at its outer end so as to fit against the conveX side of a disk as shown in Figure 3.

In practical use the disk gangs are mounted on any suitable type of machine commonly provided for that purpose and are rotated by power to cause the disks to revolve and the tongs are so placed as to engage the peripheral portions of the disks successively until the desired grinding operation is completed. In the common type of disk harrow the disks on opposite sides of the center are oppositely arranged, and therefore it is desirable to make the tongs reversible as I have shown them in order that the oppositely arranged disks may be ground from the same side of the machine and in the same manner. This reversing function is also desirable where it is desired to grind the disks on both sides of their peripheries, as is shown in Figures 2 and 3. To facilitate this reversal I have provided the stud 12 with an elongated head designated by the numeral 21, said head being arranged transversely of the arm 18. The

tong arm 14: is provided with an elongated slot extending lengtlnvise and so arranged that it may be removed or replaced relative to the head 21 of the stud when the arm ll is extended to a position where itis substantially at right angles to the arm 13. hen in its normal operating position, the arm ll; is held by the head of the stud in a pivotal engagement relative to the other arm 13. This permits the arm 1-1 to be quickly and readily removed and reversed, by turning it over, without the use of a tool of any kind. The blade us is also reversed at the same time, so that it points toward the roller 19, and the device may be used eiiectively in either position.

I claim as my invention--- l. A disleslmrpenin r tongs, cmuprising a support a ldado-carrying arni pivoted thereon, a blade reversibly and adjustably mounted in said arm, a pivot stud. having, an elongated head, a second arm 'l'ormed with a longitudiiml slot arranged to be removed and replaced relative to said headed stud when in a certain position, and a roller pivoted on the second arm in opposition to said blade.

3. In a disk-sharpening tongs, a support, an arm pivoted thereon and formed at one end with a bracket having a vertical seat, a uniting blade lifted to said seat and re n'iovable by upward movement theretronn and an adjusting screw vertically threaded in the lower part of said bracket and engaging beneath the lower end oil? said blade. whereby the vertical adjustment of said blade may be effected.

3. In a disk-sharpening tongs, a tong arm pivotally mounted and carrying acutting blade at one end, and a second tong arm pivotally mounted relative to the lll'db arm and having; a roller pivoted at one end in opposition to said blade the pivot stud having an elongated head and the second arm having a corresponding slot arranged at an angle to the trend of sa id head when the arms are in their normal operative positions, whereby the second arm may be readily 1'emoved and replaced by extending it to a particular angle relative to the first arm, and is held against ronmval when in normal operative position.

ISAAC I-I. FARMER 

